Discussion
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- Question
Moisture can be removed from lubricating oil using
Options- A. tubular centrifuge
- B. clarifier
- C. sparkler filter
- D. vacuum leaf filter
- Correct Answer
- tubular centrifuge
- 1. A pebble mill
Options- A. is a ball mill.
- B. employs flints or ceramic pebbles as the grinding medium.
- C. is a tube mill lined with ceramic or other non-metallic liner.
- D. both (b) and (c). Discuss
- 2. Colloid mills achieve size reduction mainly by
Options- A. impact
- B. attrition
- C. cutting
- D. compression Discuss
- 3. Mesh indicates the number of holes per
Options- A. square inch
- B. linear inch
- C. square foot
- D. linear foot Discuss
- 4. For removal of very small amounts of precipitate from large volume of water, the most suitable filter is the __________ filter.
Options- A. plate & frame
- B. shell & leaf
- C. sand
- D. rotary vacuum Discuss
- 5. Which of the following represents the plot of filtrate volume versus time for constant pressure filtration?
Options- A. Parabola
- B. Straight line
- C. Hyperbola
- D. Exponential curve Discuss
- 6. The most common filter aid is
Options- A. diatomaceous earth
- B. calcium silicate
- C. sodium carbonate
- D. silica gel Discuss
- 7. Size reduction of asbestos and mica is done by
Options- A. hammer mills
- B. rod mills
- C. gyratory crushers
- D. crushing rolls Discuss
- 8. For achieving maximum capacity of the ball mill, the ball charge should be equal to about __________ percent of the ball mill volume.
Options- A. 10
- B. 25
- C. 50
- D. 75 Discuss
- 9. The speed of a rotary drum vacuum filter may be about __________ rpm.
Options- A. 1
- B. 50
- C. 100
- D. 500 Discuss
- 10. The sphericity of a cylinder of 1 mm diameter and length 3 mm is
Options- A. 0.9
- B. 0.78
- C. 0.6
- D. 0.5 Discuss
Mechanical Operations problems
Search Results
Correct Answer: both (b) and (c).
Correct Answer: attrition
Correct Answer: linear inch
Correct Answer: sand
Correct Answer: Parabola
Correct Answer: diatomaceous earth
Correct Answer: hammer mills
Correct Answer: 50
Correct Answer: 1
Correct Answer: 0.9
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